Potential of CoMn2O4 spinel as soot oxidation catalyst and its kinetics thereof

Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)

Published: Jan. 7, 2025

Abstract Efficient catalysts for soot oxidation are critical mitigating environmental pollution. In this study, CoMn 2 O 4 spinel were synthesised using reverse co-precipitation and methods to evaluate their performance in kinetic behaviour. All samples exhibited a tetragonal phase (XRD) spherical morphology with rough surfaces (SEM). Raman spectroscopy confirmed structural disorder oxygen vacancies, while XPS analysis revealed the presence of low-valence Mn ions, facilitating vacancy formation oxidation. Additionally, co-existence Co ions contributed synergistic effect, enhancing catalytic properties structure. The method produced catalyst higher concentration vacancies active species among samples. This sample demonstrated superior performance, achieving T 50% 424 °C, low activation energy (153 kJ/mol) pre-exponential factor (25 min − 1 ). Soot TPR highlighted role reducibility, thermogravimetric that factors influenced by surface composition. These findings provide valuable insights into design efficient oxidation, emphasising importance synthesis characteristics.

Language: Английский

Designed Fabrication of SnO₂/In₂O₃/C Electrochemical Sensors for Coolant Leakage Detection in Energy Storage Systems

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

The liquid cooling system for lithium iron phosphate battery modules usually faces the threat of coolant leakage, which would dramatically affect heat transfer performance, safety, and efficiency energy storage system. Herein, electrochemical sensing technology has been first employed to detect leakage. Specifically, ethanol is selected as additive reagent used main tested substance, sensors indirectly identify leakage by detecting leaked ethanol. In order overcome disadvantages pure SnO2 detection, including poor response, low gas selectivity, high operating temperature, microspherical-structured SnO2/In2O3/C composite designed synthesized using a tin-indium metal-organic framework (SnIn-MOF) precursor. fabricated sensor exhibits excellent gas-sensing performance. response could reach 30.1 at 280 °C, 1 mL with only 0.01% be detected sensor. Moreover, also satisfactory cycling repeatability stability. This outstanding performance attributed structural stability synergistic effects SnO2, In2O3, carbon. work innovatively proposed feasible method high-quality material detection in an system, great importance application potential field conversion.

Language: Английский

Advances in hydrogen storage materials for physical H2 adsorption

International Journal of Hydrogen Energy, Journal Year: 2024, Volume and Issue: 97, P. 1261 - 1274

Published: Dec. 5, 2024

Language: Английский